Viessmann Vitocal 350-A Installation And Service Instructions Manual page 155

Control unit diagnostics
Posi- Display
tion
8 "0"
9 "0"
10 "1"
11 "0"
12 "2"
Fault code "Err" E
Position Code
Parts, fault messages result from a plausibility check of actual values
1 1
2
2 1
2
4
8
Parts, fault message reported directly from EEV controller
3 1
2
4 1
2
4
8
5 0
6 0
Messages
7 1
8 1
2
4
8
9 0
(cont.)
Codes Explanation (Tab. I)
(Tab. C)
0 —
0 EEV controller hardware version 01
1
0 EEV controller software version 02
2
Explanation
LPG temperature sensor faulty
EEV stepper motor faulty
Low pressure sensor faulty
Suction gas temperature sensor faulty
High pressure sensor faulty
Hot gas temperature sensor faulty
LPG temperature sensor faulty
EEV stepper motor faulty
Low pressure sensor faulty
Suction gas temperature sensor faulty
High pressure sensor faulty
Hot gas temperature sensor faulty
N/A
N/A
Inadequate evaporation pressure (low pressure shutdown)
Condensation temperature too high
Condensation pressure too high
Suction gas superheating temperature too low
Suction gas superheating too high
N/A
Troubleshooting
155